Taxon - Links and literature
Illustrated Lists of American Butterflies 9-III-2024 [Helicopis_gnidus_nigrobasalis_a]
Warren, A. D., K. J. Davis, E. M. Stangeland, J. P. Pelham, K. R. Willmott & N. V. Grishin: Illustrated Lists of American Butterflies [http://butterfliesofamerica.com/] [as Helicopis gnidus nigrobasalis Aurivillius, 1929]
Data retrieved on: 6 January 2025